Java中bean之间互相转换

废话不多说，直接上代码！

import java.beans.FeatureDescriptor;
import java.beans.PropertyDescriptor;
import java.util.Arrays;
import java.util.Set;
import java.util.stream.Collectors;

import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;

public class BeanUtils {

    public static  T transform(Object src, Class clazz) {
        if (src == null) {
            return null;
        } else {
            Object instance = null;

            try {
                instance = clazz.newInstance();
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            org.springframework.beans.BeanUtils.copyProperties(src, instance, getNullPropertyNames(src));
            return (T) instance;
        }
    }

    private static String[] getNullPropertyNames(Object source) {
        BeanWrapper src = new BeanWrapperImpl(source);
        PropertyDescriptor[] pds = src.getPropertyDescriptors();
        Set emptyNames = (Set) Arrays.stream(pds).filter((pd) -> {
            return src.getPropertyValue(pd.getName()) == null;
        }).map(FeatureDescriptor::getName).distinct().collect(Collectors.toSet());
        String[] result = new String[emptyNames.size()];
        return (String[])emptyNames.toArray(result);
    }

}